The high temperature red injected molded reinforced silicone reducer coupler is designed to connect to a (3 in. x 3-1/8 in.) ID tube and is 3 in. long. Standard stainless steel worm-gear #052 clamps provides tight connections, durability and is corrosion resistance for industrial, commercial, truck, off-road and racing applications. NOTE: Not suitable for use with forced induction applications.